Слайд 2Keywords
Power Distribution – распределение электроэнергии
Generators - генераторы
Transformer – трансформатор
Higher voltage – высокое
![Keywords Power Distribution – распределение электроэнергии Generators - генераторы Transformer – трансформатор](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/374985/slide-1.jpg)
напряжение
Transmission lines – линии передач
Substation - подстанция
Слайд 3 Most electrical power originates from generators capable of generating many thousands
![Most electrical power originates from generators capable of generating many thousands of watts.](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/374985/slide-2.jpg)
of watts.
Слайд 4A schematic diagram of the power distribution from the generator to the
![A schematic diagram of the power distribution from the generator to the](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/374985/slide-3.jpg)
consumer is illustrated in the figure below.
Слайд 5Electric power distribution from generating plant to low voltage (normally 115/230 v)
![Electric power distribution from generating plant to low voltage (normally 115/230 v) distribution system.](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/374985/slide-4.jpg)
distribution system.
Слайд 6After generation at 2.3 - 13.8 kv the electricity travels to a
![After generation at 2.3 - 13.8 kv the electricity travels to a](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/374985/slide-5.jpg)
transformer where the voltage is stepped up to several thousand volts; in come cases it approaches one million volts.
Слайд 7This high voltage electricity may travel for many miles. With the higher
![This high voltage electricity may travel for many miles. With the higher](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/374985/slide-6.jpg)
voltage, a lower current is developed, causing lower losses. Thus, the losses due to resistance heating are reduced greatly in high voltage transmission lines.
Слайд 8Along the way there may be step-down transformers that lead to secondary
![Along the way there may be step-down transformers that lead to secondary transmission lines.](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/374985/slide-7.jpg)
transmission lines.
Слайд 9As the lines near residential areas, communities, or industries there generally is
![As the lines near residential areas, communities, or industries there generally is](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/374985/slide-8.jpg)
a substation located in which there are further step-down transformers. From these substations are primary mains that may carry only a few thousand volts, e.g 2 300. Then from the primary main the electricity may be taken off at distribution transformers to secondary mains that carry 115/230 v for most residences, farm customers, and small business and industries.
Слайд 10The service wires at 115/230 v then go to a meter and
![The service wires at 115/230 v then go to a meter and](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/374985/slide-9.jpg)
hence into the residential or farmstead electrical distribution system. Some higher voltage systems, such as 220/440 v are used for small business or processing and manufacturing plants.